Why Authenticator don't work in another phone?

Makarios 86 Reputation points

I have two iPhones, say A and B, and both have the Authenticator app. The phones are meant for different purposes. I have also another computer for purpose B. In the case A Authenticator works fine. But in the case B, when the computer B ask me to approve the request, the Authenticator B don't react. What should I do?

Microsoft Authenticator
Microsoft Authenticator
A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation.
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